Do I need planning permission in Wandsworth?

Planning permission in Wandsworth sounds straightforward — until you realise that two houses on the same street can face completely different rules. Whether you're in SW11 or SW18, the answer to "do I need permission?" almost always starts with "it depends on your property" — and most homeowners don't realise how much depends until it's too late. The best starting point is to see what applies to your exact address — free, in about a minute.

Your permitted development rights might not be what you think

Most homeowners assume they have a standard set of rights to extend, add a dormer, or change their windows without applying for permission. Wandsworth complicates that assumption significantly. Article 4 Directions — which strip away permitted development rights on certain streets — are in place across parts of Clapham and Battersea, targeting Victorian terraces in particular. That means changes that would normally be automatic elsewhere in London require a full planning application here.

The catch? There's no obvious sign on your door. You might own a property with restricted rights and have no idea. The rules exist at the street level, sometimes the individual plot level, and they vary in ways that a general Google search won't reveal.

Conservation areas: knowing you're in one isn't enough

Wandsworth has conservation areas covering Battersea, Clapham Common West Side, Wandsworth Common, Putney, and more. Most homeowners in these areas know they're in a conservation area — what they don't know is what that actually means for their specific project.

Being in a conservation area doesn't automatically block your plans, but it does change which works need permission and how applications are judged. A rear extension that sails through in one part of the borough might face significant scrutiny a few streets away. The difference between knowing you're in a conservation area and knowing what that means for your loft conversion or side return is enormous — and that's where most people get caught out.

Flood zones add another layer nobody expects

Riverside properties in Battersea, Putney, and Wandsworth town sit within flood zones — and this affects planning in ways most homeowners don't anticipate. It isn't just about whether your ground floor might flood. Flood zone status influences what types of development are acceptable, what assessments you might need to submit, and how your application is assessed. It's one more variable that makes your property's situation genuinely different from your neighbour's.

The best way to understand how your property's specific combination of constraints affects your actual chances is to check what's been approved and refused for similar projects on your street.

What this means before you start

Wandsworth Council's typical decision time is 8 weeks, and a householder application costs £548. Getting to that point with the wrong assumptions about whether you even need permission — or with a project design that conflicts with local precedent — is an expensive mistake. Most homeowners don't realise that what's been approved or refused nearby is one of the strongest signals of what will happen to their application.

Before you commission drawings or speak to a builder, see the approval record near your address and what it means for your odds — free, no signup needed.